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    <link rel="stylesheet" href="ex4.css" />
	<title></title>
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<body>
    <ol>
    	<li><a href="http://abc.com">here a link un visited</a></li>
        <li></li>
    	<li><a href="http://bucunzai.info">here is a visited link</a></li>
    </ol>
    <ul>
    	<li>test</li>
    	<li>test2</li>
    </ul>
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